Concentrator



Unirse .STATE-s 'PATENT Ormea.

YJOHN N. RANDEL, .OF OASTLEAROOK, COLORADO.

CONCE'NTRATO R.

ST'ECIE'ICATION forming part of Letters .Patent- No. 332,831, dated December :22, 1885.

Application filed August 20, 1885.

.Toy all whom it may concern:

Beit known that I, J oHN N. HANDEL, a citilzenfof the United States, residing at Castle SRock,-in the county of Douglass andState of Colorado, have invented a new and useful Confcentrator, of which the following is a specification, reference being had to theaccompanying drawings, in which thel same letters refer to the same or corresponding parts.

'My invention relates to improvements in concentrators for treating auriferous or argentiferous sand in placer-mining; and the object of lluy-improvements is to provide a-simple and effective means for separating the Vparti- .cles of precious metal from the crude material with which they are found mingled in placermines, all of which is hereinafter fully described and claimed.

In the drawings, Figure lisa side elevation of the machine. Fig. 2 is a top view of a propelling-shaft and its attachments. Fig. 3 isa top View of a portion of a branched rod by means of which motion is communicated to the concentrating-box. Fig. 4 is an eccentric. Fig. 5 shows the gearing, shafting, crank, Snc., by means of which motion is communicated to the machine. Fig. 6 is a perspective view of a portion of the riftled plate in the bottom of the concentrating-box. Fig. 7 shows the maa ner of attaching the hopper to the concentrating-box. Fig. 8 is a top view of the hopper.

The standards A, B, and C, one on each side of the machine, together with the horizontal bottom beams, D, one on each side of the machine, allbeing properly connected and braced, as shown in Fig. l, constitute the frame-work of my machine.

ais a hopperoc-cupying the oblique position shown in Fig. 1. Hopper a is supported between the standards A at one extremity by means of metal straps a, which are attached to the hopper c below, and hooked into the eyes of hangers b above,said hangers being attached to the cross-beam E, as shown by dotted lines in Fig. 1. The mouth of hopperais attached to the rear extremity of concentrating-box c by means of metal straps o', as shown in Fig. 7. Straps c are attached to concentrating box c by means of rod c2, which extends across box c, passing through its sides. Straps c are pivoted to rod c2. The upper two-thirds Serial No. 174,912. (No model.)

of the bottom of hopper a consist of `a board, on top of which are placed metal bars, which extend the entire length of the hopper, -forming 'a screen, a?, above the mouth of the same, for a distance of about one-third of its length,

as shown in Fig. 8. The concentratingbox c is suspended between the standards A,B, and C by means of hangers d and rods e.

There is a hanger, d, on each side of the machine, only one being shown in the drawings. E'ach hanger d is pivoted at its lower extremity to the concentrating-box, and the upper extremity of each of said hangers is attached to a beam, F, by means of a bolt, f, which allows said hangers to turn readily upon the same as the box c moves back and forth 4when the machine is in operation.

There are two rods, e, exactly alike and on opposite sides of the machine, only one of said rods being shown. Each extremity of the rods eis hooked into the eye of a bolt, the lower extremity being attached to bolt g and the upper extremity to bolt h. Bar q is attached to the concentratingbox c by means of bolts g, one of said bolts being on each side of the machine, only one being shown in the drawings. Each bolt h (there being two) is attached to the framework of the machine, as shown in the drawings.

In the bottom of concentrating-box c and covering said bottom is placed a plate, Z, constructed of any suitable sheet metal, in which plate are formed the rifles Z, as shown in Fig. 6. The rifled plate l may be fastened to the bottom of box o in any suitable manner.

Attached to the outside of one of the standards A is the short standard A,Withsuftlcient space intervening for the reception of the cogwheeler' and j. Journaled to standardsAand A, in suitable journal-boxes,o, is the shaft m, to which the crank n and the cog-wheel t are attached, said cog-wheel being between the standards A and A and meshing with a smaller cog-wheel, j, upon the shaft p, said shaft being journaled to standard A, as shown. Shaft p extends beneath the riftled box, and is also journaled to the opposite standard A. The central portion of shaft p is formed into a crank, p. (Shown in Fig. 2.) To crank p is attached one extremity of rod k, the other extremity of said rod being attached to two short IOO rods, k, which branch outward as they extend backward, where they are fastened to bar g by means of nuts, as shown in Fig. 3.

In the place of cra-nk p an eccentric, r, may be used, said eccentric being attached to the center of shaft p. To one extremity of shaft pis attached the liy-wheel s, as shown in Fig. 2.

In the operation of my improved concentrator man-power may be used, in which case the power is applied by means of the crank n. A band-wheel or chain-wheel may be placed on shaft m in place of the crank, and the machine may then be run by steampower, horsepower, or any other power, as may be desired. Power being applied to the shaft m, the cogwheel i is made to revolve, which imparts motion to the shaft p. The motion ofthe shaft p moves the rod lo back and forth,whether the crank p or the eccentric r is used. The motion of the rod k imparts motion to the concentrating-box c by virtue of the mechanism herein described. The motion of the concentrating-box imparts a similar movement to hopper a. Power being applied to the machine, as aforesaid, the material to be treated is placed in the upper part of hopper a, and immediately precipitated upon the screen a2 in the lower portion of the hopper,which screen rejects the coarse worthless material and throws it from the machine, the sand and valuable particles of metal passing through the screeninto concentrating-box c. As the material passes over the riffled plate in box c it is deprived of its precious metal, the particles of which are retained by the riflles, which are especially adapted by their peculiar shape to save all the valuable metal contained in the material fed into the box c while the Same is in motion, as before described. After being deprived of all that is valuable, the worthless material is discharged from the machine at the rear and lower extremity of box c.

The Water required in operating the ma` chine may be discharged into the hopperaby any suitable means.

Several of my improved machines may be placed side by side upon a single frame, with one shaft, p, extending through all, so that all may be operated by the same power applied to shaft m.

In cleaning up the riffled plate Z may be removed from box c ornot, as may be desired.

What I claim as my invention, and desire to secure by Letters Patent of the VUnited States, is

l. In a concentrator, the combination of a suitable frame, the concentratingbox c, provided with the riflled plate Z, said concentrating-box being supported as described, and mechanism for operating box c, consisting of gearwheels z' and j, shaft p, provided with crank p', rod k, provided with branches 7c', and bar q, substantially as shown and described, and for the purpose set forth.

2. A concentrator comprising a suitable frame, the hopper u, supported as described, concentrating-box c, supported as described, and provided with riftled plate l, and mechanism for operating hopper aand box e, consisting of gear-wheels t' and j,shaft p, provided with eccentric p and ily-wheel s, rod lc, provided with branches lc', and bar g, substantially as shown and described, and for the purpose set forth. i

This specification signed and witnessed this 10th day of August, A. D. 1885.

JOHN N. HANDEL.

In presence of- R. M. McDnRMotrr, Josurn: L. PUTNAM. 

